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Tikhova V. D. Shakirov M. M. Fadeeva V. P. Dergacheva M. I. Samutenko L. V. Fedorova L. V. 《Russian Journal of Applied Chemistry》2002,75(5):829-833
Quantitative and qualitative changes in humic acids of meadow soddy soils, occurring under the action of various fertilizer systems, were studied by 13C and 31P NMR. 相似文献
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